Board Certifications:- Diplomate of The American Board of Internal Medicine, 2000- Diplomate of The American Board of Hematology, 2003- Diplomate of The American Board of Medical Oncology, 2004- Diploma of The Thai Board of Internal Medicine, 2005- Diploma of The Thai Board of Hematology, 2005- Diploma of The Thai Board of Medical Oncology, 2005